Setting and controlling mechanism for controlling movement of dogs on sawmill carriages



June. 23, 1925. I 1,543,216

1 F. E. MARTIN SETTING AND CONTROLLING MECHANISM FOR CONTROLLING MOVEMENT QF'DOGS ON SAWMILL CARRIAGES Filed June 19, 1922 2 Sheets-Sheet 1 Mar in;

June 23, 1925. 1,543,216

. F. E. MARTIN SETTING AND CONTROLLING MECHANISM FOR CONTROLLING movsmsn'r OF DOGS 0N SAWMILL CARRIAGES Filed June 19. 1922 2 Sheets-Sheet 2 r 1 7 6 1 20 r w if imam Patented June 23, 1925.

UNITED STATES snnnnnro MARTIN, on WEED,

CALIFORNIA, ASSIGNOB TO MARTIN AIR DOG COM- PANY, 0 SAN FRANCISGO, 'CALIFOR-NZA, A CORPORATION OF CALIFORNIA.

SETTING AND CONTROLLING IJIECEifiNISlE FOR CONTROLLING MOVEMENT OF DOGS ON SAWMILL CARRIAGES.

Application filed June 19,

To all whom it may concern:

Be it known that I, Fnnnnnion Ellhnrin, a citizen of the United States of America, residing Weed, in the county of Siskiyou and State of California, have invented certain new and useful Improvements in Setting and Controlling Mechanism for Controlling Movement of Dogs on Sawmill Carriages, of which the following is a specification.

This invention relates to means for con-- trolling, setting, and selecting mechanism, for determining the movement of dogs to effect what is known as a partial stroke movement in saw carriage operating mechanism such as described in my co-pending application for patent, filed November 25th, i921, Serial Number 5175i? In the application referred to, the partial stroke setting and controllingmechanism is shown as a hinged abutment, against which a stop contacts to limit the movement of a selected valve to admit pressure to desig nated pistons to determine the piston stroke, and correspondingly determine the depth of the thrust of the dogs into a log. found that in certain saw mill rigs, the vibration in some instances displaces the hinged abutment and the contemplated stroke of the piston actuating the dogs is frequently quite different from that contemplated and desired. To meet this contingency, I have provided a combined setting and locking mechanism for controlling the movement of the dog setting valves, which is absolutely safe and reliable and will insure of the contemplated result l sing carried into effect.

Therefore, one of the objects of this invention is to provide a combined setting and controlling means for accurately and positively determining the movement of the dogs, and one which cannot become unlocked by vibration, and can only be manually unlatched at the will of the operator.

As fully set forth in my application re ferred to, it is essential that the unit control for setting the various dogs on a carriage be so constructed and arranged that the setting operation can take place during a sawing operation, and this without disturbing the di in engagement with a log. It is an object of this invention to provide improved I have.

1922. 'Serial No. 569,499.

means to accomplish this result, and this without interference with the interlocking action of the abutment if engaged by one of the valves. In other words, I propose to provide means whereby a selection for a partial stroke of the dogs may be made at the time the valves are operated or positioned for a full stroke of the dogs, without in anywise afiecting the latter position, and then subsequently after completion of the full stroke movement, the abutment, by reason of the set made, automatically assumes position to limit the movement of the valve to make a partial stroke of the dogs. 01' I may operate the parts and set same to make a full stroke of the dogs at the time the valve is set and held in partial stroke position, without in anywise affecting the latter position and the result being accomplished, and subsequently when the partial stroke has been completed and the valve is returned to normal position, the valve limiting means will automatically remove itself so that such full stroke movement of the valve can after wards be made.

In the drawings:

Fig. 1 is a perspective view of a group of valves and operating means therefore for a unit control, such as described in my before mentioned application and illustrating the application of my invention.

Fig. 2 is a detail perspective view of my improved controlling setting and selecting means.

Fig. 3 is a transverse section of the invention, illustrating the position of parts when set to make a partial stroke movement of the boss dogs.

Fig. l is a similar View but illustrating the position of the parts when making a full stroke movement of the boss dogs.

Fig. 5 is an enlarged detail view of the abutting bar and its support when in the position shown in Fig. 3.

Fig. 6 is a similar iew when in the position shown in Fig. 4.

The invention is directed more particu larly to the boss dogs on a saw mill carriage and will be so described.

1 indicates a frame supported on a saw carriage, 2 and 3, boss dog valves, and 4 a series of valves to operate other dogs on From each boss dog aive leads three pipes 5, 6, and 'Z, communicating with a fluid pressure cylinder 8, having a piston 9, the rod of which is connected to boss dogs 10. From the stem each valve projects an extension ll, having at its tree end a finger piece 12, and an interponent 13, which coacts with a lock out bar 14-. indicates mechanism for actuating the selected valves. These parts are the same as disclosed in my co-pending application and are snown and referred to mer y to rive a comprehensive l ng of the 'ovcinent. t 5; across the trout or the frame 1, is a bar 16, age list which the linger piece 12 abuts when the extension is moved in one direction, to limit the mov ent of its particular valve, while the opposite side of the tar serves a abutment for a stop 1'1" on the extension to limit the movement of the valve when the extension is moved in the opposite direction.

nection with the valve extension 11, which will be hereinafter broadly termed a multi ple position control member, the provision means which may be operated to define one or another of the several positions of such control member. The defining means, hereinafter specifically referred to as an abutment, is capable of being set for movement from one defining position to another at any time or in any relation of the control member. If set when the control memher is operative, the defining means will be held against movement responsive to such set by the control member, but as soon as the control member moves from operative position, the defining means acts automatically, responsive to such previous set, to define a subsequent operative position of the control member. The defining means comprises an abutting member, tiltable in aligned openings 19, formed in ears 18, projecting forwardly from the frame 1.

he lower wall 20 of each opening 19 is parallel with the edge of the car, while the rear wall 21 is arcuate, and the top wall 22 inclines upwardly and rearwardly, the fron wall 23 being at right angles to the wall 22. Mounted to tilt in the slots 19, is an abutting bar 24-, having an inclined rear edge 25, while the front edge 26 is substantially at right angle to the upper and lower surfaces of the bar. llhen in normal position, the proportion of the slots and the thickness of the bar are such that the top surface of the bar is about or slightly below the level of the bottom of the extension, so that the latter may pass freely in one operation to be described.

Secured near one end of the abutting bar 24 and extending upwardly therefrom, is a bracket 27, bent somewhat in v -form, and provided at the angle of the V format-ion ine present invention provides in conwith a slot 28. Secured to the bar 16 and in alignment with the bracket 2?, is a bracket 29, formed with a slot 30, the upper end of the bracket being shaped to form a guard 31 to prevent accidental injury of the fingers of the setter when manipulating the setting device. 32 indicates a bar slidably mounted in the slots 28 and 30, and provioed with a pin 38, which engages with bracket 27, to limit the movement of the bar in one direction, and a pin 34, against which and the angle of the guide 27, a spring 35 bears to normally move the bar rearwardly to bring the pin 38, up against the bracket 27. The top edge of the bar 32, beyond the bracket 29, is provided with a flange 36-, and at its free end it is formed with a hand grip 37.

Let it be assumed that the unit control is set to actuate the boss dogs full stroke. Under these circumstances, the bar 32 will, by the action of spring 35, be projected rearwardly with the pin 33 up against the bracket 27, and the flange 36 disengaged from bracket 29, the abutting bar 2% tilted downwardly and supported on the bottom walls 20 of slots 19, shown in Fig. a. When the parts are in this position, the extension 11 can ride over it and thereby permit the stops 1'? to contact with the bar 16 and open the valve 2 to direct pressure through pipe 7, and exhaust through pipe 6, in cylinder 8 and operate the dogs full stroke. As stated, the bar 82 is projected rearwardly by the spring 35, the length of the spring being such as to expand itself at this time and permit the bar 2st to tilt downwardly. l l hile theiparts are in this position, that is, when the extension 11 lies over the bar 24, the setter can set the mechanism for a subsequent partial stroke opera tion, and this can be accomplished without interfering with the now fullstroke position of the dogs. The setter places the palm of his hand over the guard 31 and his fingers over the hand grip 37 and exerts pressure toward the front until the flange 36 slips behind the upper wall of slot 30 as shown in full lines in Fig. 3, and in dotted lines in 4; which forms an interlock between the bar 32 and the bracket 29. In exerting pressure on the bar 32, the pin 3% engages the spring 35 and compresses it, and as the abutting bar 2 is down in the slots and the extension over it, the bar cannot rise but'is placed under tension. The spring being now under compression, when the extension 11 is pushed in by the setter to retract the dogs, immediately the outer end f the extension passes over the edge 25 of the bar 24, the spring exerts itself and tilts the bar upwardly on its corner t0, the juncture of the walls 20 and 23 serving as a fulcrum. The bar tilts until its upper surface contacts with the upper walls of the slots 19, at which time the front wall 28 rests squarely against lit) the front walls 23 of the slots, while its front inclined edge is positioned parallel with the front edge at he extension. and is hereiore in position to act as an abutment upon the next forward stroke of the extension when pulled out by the setter. Thus, when the extension is pulled out, it will contact with the abutting bar and position valve 2, to admit pressure through pipe 7, and exhaust through pipe 5, and admit pressure to the cylinder 8 to partially project the dogs, as shown in Fig. 3. It, while the parts are in this position, that is, partial stroke position, the setter desires to make a selection for the next stroke of the boss dogs, that is, a full stroke, and the same time not disturb the partial grip of the dogs, then, and in that event, the setter simply depresses the hand grip 37 to disengage the fiange 36 from bracket 29, and the spring 35 exerts its pressure on the pin 22, and returns the bar 32 to normal position, but notwithstanding the release of this pressure from guide 2?, the abutting bar 2e will be retained in its elevated position, due to its being limited in its tilting movement to an arcuate path, the angularity of the rear edge 25, and its engagement with the vertical front edge or the extension 11.

Hence, even though pressure on the bar 24 is relieved, it cannot return to normal position until the interlock is broken by reversing movement of the valve. Itfollows therefore that notwithstanding a new selection may have been made, the partial stroke set will not be disturbed until the setter pushes in the extension, whereupon the bar- 24 drops to position for the next selection.

From the foregoing description, it will be seen that I have provided simple and positive means for locking the setting means in partial stroke position, and selecting means which may be operated conveniently and quickly for a subsequent movement of the dogs, irrespective of the position of the valve.

lVhat I claim is:

1. Means for controlling and limiting the movement of a dogging device on saw mill carriages, comprising a valve, means for limiting the valve to a full stroke movement to project the said dogging device to their fullest extent, a movable abutment adapted to be positioned to limit the movement of the valve to cause partial projection of the said dogging device, and manually operable means adapted to automatically and subsequently afiect said abutment for positioning same. 7

2. Means for controlling and limiting the movement of a dogging device on saw mill carriages, comprising a valve, means for selectively determining the movement of the valve to a position to wholly or partially project the said dogging device, including manually operable means adapted to automatically and subsequently aliect said determining means for positioning same, and means for locking the manually operable means in one of the selected positions.

3. Means for controlling and limiting the movement of dogs on saw mill ca 'ages, comprising a valve, and means determining the movement of the valve capable of being selectively set for a subsequent operation of the valve whether at the time of selectionvthe valve be positioned to Wholly or partially project the dogs or in normal position to retract the dogs.

4. Means for controlling and limiting the movement of dogs on saw mill carriages, comprising a valve, and means determining the movement of the valve capable of being selectively set for a subsequent operation of the valve whether at the time of selection the valve be positioned to Wholly or partially project the dogs or in normal position to retract the dogs, the selective setting being maintained until shifted by the operator.

5. Valve operating and controlling means for saw carriage dogs, comprising a valve having an extension, means for limiting the full stroke movement of the valve in one direction, a movableabutment disposed so tha when in one position the extension may pass to make a full stroke movement or the valve and when in another position said abutment will interrupt the movement of the valve before it reaches its full stroke position, and means for determining the position of the abutment for subsequent operation of the valve irrespective of theexisting position of the valve.

' 6. Valve operating and controlling means for saw carriage dogs, comprising a valve having an extension, means for limiting he full stroke movement of the valve, a tilting abutment. to limit the, valve to a partial stroke, means for mounting the abutment to permit uninterrupted passage of the extension when opening the valve full stroke, means for tilting or setting the abutment to interrupt the full stroke movement of the valve and simultaneously place the abutment under tension and lock it in set position, whereby if the setting takes place when the valve is in "full stroke position, the tension and lock will be effected, and when the valve movement is reversed, the abutment will be tilted by the tension to interrupt the next successive movement of the valve.

7 Valve operating and controlling means for saw carriage dogs, comprising a valve having an extension, means for limiting the full stroke movement of the valve, a tilting abutment to limit the valve to a partial stroke, the edge of the abutment cooperating with the extension being bevelled to correspond with the edge of the extension when the abutment is tilted, scans for mounting the abutment to permit uninterrupted passage oi" the extension when opening the val re lull strol-ce, means for tilt or s tting the abutment to interrupt the l r til stro re movement of the valve and simultaneously place the abutment under tension and lock it in set position, whereby it the setting takes place when the valve is in full stroke sition, the tension and l cl; will be e l a, and when the valve movement is rev rsed, the abutment will be tilted by the tension to interrupt the next successive movement of the valve, and whereby iii the lock and tension released when the abutment is tiltet and engaged by the extension, the bevelled edge of the abutment will form an interlock with the extension and retain its tilted position until the valve is advanced toward normal position.

8. A multiple-position control member for determining the projection of the dogs of a saw mill carriage, means for defining the operative position of such member, and means for setting the defining means for movement from one defining relation to the member to another defining relation thereto while the member is in operative position, said defining means being automatically responsive to said sett means on movement of said member from operative position.

A n'iultiple-position control member for determining the projection of the dogs oi a saw mill carriage, element adapted for a plurality of positions to define the operative position 01 the member, the operative position of the member holding the element from movement from one position to another, and means whereby the element may be moved from one position toanother when free to move, said means setting the element for subsequent automatic movement in the event themeans is operated when the element is held by the member against movement.

1(). A multiple-position control member for determining the projection of the dogs of a saw mill carriage, a stop adapted in one position to limit the movement of the member and in another position to permit movement of said member beyond such limit, and means operable in any relation of said member and stop to ultimately change the position of said stop in its relation to and when free of the member.

11., A inultipleposition control member for determining the projection of the dogs of a saw mill carriage, a tiltable bar adapted when set in one position to limit movement of the member and when setin another position to permit the member to pass beyond such limit position, said bar being held in either set position directly by the control member, a spring operating when tensioned to tilt the bar to one position and when free of tension to permit the bar to gravitate to another position, and means for changing the tensioned condition of the spring at will.

1.2. A multiple-position control member determining the projection of the dogs a saw mill carriage, a bar capable of IO positions with relation to and thereby ining an operative movement of the mem saio member in either operative position meriting with the bar to prevent move t iereo'f, a spring acting in accordance 1 its tension to provide for movement of from one position to another, and means for controlling the tensioned condition oi the spring. 7

13. A multiple-position control member for determining the projection of the dogs of a saw mill carriage, a bar ,movable to a stop or non-stop relation to the movement oi the member, saidmember serving when operated to lock the bar in either stop or non-stop relation, a spring normally operative vhen tensioned to move the bar from non-stop to stop relation to the member, and means for tensioning said spring at will.

14. A multiple-position control member "for determining the projection of the dogs or a saw mill carriage, a bar movable to a stop or non-stop relation to the movement or the member, said member serving when operated to lock the bar in either stop or non-stop relation, a sprin normally operative when tensioned to move the bar from non-stop to stop relation to the member, and means for tensioning said spring with out regard to the locked relation of said bar and .member.

15. A multiple-position control member for determining the projection of the dogs are fish oi a saw mill carriage, a bar movable to a stop or nonstop relation to the movement of the member, said member serving when operated to lock the bar in either stop or non-stop relation, a spring normally operative when tensioned to move the bar from non-stop to stop relation to the member, and means f r tensioning said spring without regard to the locked relation of said bar and member, said spring acting to ultimately move the bar when the t through movement of the member.

16. A multiple-position control member for determining the projection of thedogs of a saw mill carriage, a bar movable to a stop or non-stop relation to the movement of the member, said member when operated serving to lock the bar in its then relation la ter is released I Cal for determining the projection of the dogs of a saw mill carriage, a bar movable to a stop or non-stop relation to the movement of the member, said member when operated serving to lock the bar in its then relation to the bar and against movement, a spring adapted when tensioned to influence the bar for movement from non-stop to stop position, said spring when free of tension permitting the bar to move by gravity from stop to non-stop position, and means for manually controlling the tension of the spring while the bar is locked to subsequently operate said bar through such tension when the bar is unlocked. V

18. A multiple-position control member for determining the projection of the dogs of a saw mill carriage, a bar movable to a stop or non-stop relation to the movement of the member, said member when operated serving to lock the bar in its then relation to the bar and against movement, a spring adapted when tensioned to influence the bar for movement from non-stop to stop position, said spring when free of tension permitting the bar to move by gravity from stop to non-stop position, and a finger rod for controlling the tension of the spring.

19. A means for selectively determining the movement of a valve member designed to govern dogs of saw mill carriages, comprising a member movable to a stop or non-stop relation to the valve member, said member when in step relation to the valve member being in position for gravit-al movement to non-stop relation and held against such gravital movement by valve member engagement therewith.

20. A means for selectively determining the movement of a valve member designed to govern dogs of saw mill carriages, comprising a rocking element movable to a stop or non-stop relation to the valve member, said element having an inclined valve member engaging edge, adapted when the element is rocked to stop position to cause said inclined edge to be arranged at substantially right angles to the path of movement of the member, whereby engagement between said member and element holds the element against displacement through its engagement with the member.

21. A means for selectively determining the movement of a valve member designed for governing the dogs of saw mill carriages, comprising an element designed to be positioned in a stop or non-stop relation to the member, said element when in operative relation to the member being held in either stop or non-stop position directly by the member 22. A means for selectively determining the movement of a valve member designed for governing dogs of saw mill carriages, comprising an element designed to be po-j sitioned in a stop or non-stop relation to the member, said element being held in either stop or non-stop position directly by the member, and means whereby the element may be moved and held ina stop position while the member is free of engagement with the element.

24. A means for selectively determining I the movement of a valve member. designed for governing dogs of a saw mill carriage, comprising a bar-like element mounted in openings in a support to rocktransversely ot' the openings to and from operative position, said openings having a square portion to receive and provide a full bearing for one edge 01" the bar-like element when said elementis in a stop relation to the member.

25. A. means for selectively determining the movement of a valve member designed for governing dogs of saw mill carriages, comprising a bar-like element mounted in openings formed in supports, said element being rockable on one edge thereof to and from a stop relation to the member.

26. Means for controlling and limiting the movement of dogs on saw mill carriages, comprising a control member, means to define one or another of a plurality of positions of said control member and capable of being set for movement from one defining position to another at any time or in any relation of the control member.

27. Means for controlling and limiting the movement of dogs on saw mill carriages, comprising a dog controlling member, and means requiring a single movement of the operator to determine the movement of the dog cont-rolling member capable o1 being selectively set for a subsequent operation of the dog controlling member whether at the time of selection the member be positioned to wholly or partially project the dogs or in normal position to retract the dogs.

28. Means for controlling and limiting the movement of dogs on saw mill carriages, comprising a dog controlling member, and means requiring a single movement of the operator to determine the movement of the dog controlling member capable of being selectively set for a subsequent operation of the dog controlling member whether at the time of selection the member be positioned to wholly or partially project the dogs or to make a full stroke movement and when.

in another position said abutment will interrupt the movement of said member before it reaches its full stroke position, and means for determining the position of the abutment for subsequent operation of the member irrespective of the existing position of the member.

30. Means for controlling and limiting the movement of a. dogging device on saw mill carriages, comprising a movable element, means for limiting the element to a full stroke movement to project the said doggin device to the fullest extent, a movable abutment adapted to be positioned to limit'the movement of the element to cause partial projection of the dogging device, manually operable means adapted to automatically and subsequently ailect said abutment for positioning same, and means for locking the abutment against casual dis placement incident to the jar of the car riage.

31. Means for controlling and limiting the movement of a dogging device on saw mill carriages, comprising a movable element, means for selectively determining the movement of the element to a position to wholly or partially project the said dogging device, including manually operable means adapted to automatically and subsequently affect said determining means for positioning same, and means for holding the selectively-determining means in one of the selective positions against casual displacement.

32. A means for selectively determining the movement of a movable element designed to govern dogs of saw mill carriages, comprising a member movable to a stop or non-stop relation to the element, said memher when in stop relation to the element being in position for gravital movement to non-stop relation and held against such gravital movement by the engagement of the element therewith.

38. A means for selectively determining the movement of a movable element designed tor governing dogs of saw mill carriages, comprising a member designed to be positioned in a stop or nonstop relation to the element, said member when in operative relation to the element being held in either stop or non-stop position directly by the element.

34. A means for selectively determining the movement of a movable element designed for governing dogs of saw mill carriages, comprising a member designed to be positioned in a stop or non-stop relation to the, element, said member being held in either stop or non-stop position directly by the element, and means whereby the member may be moved and held in a stop position while the element is free of engagement with the member.

In testimony whereof I ailiX my signature.

FREDERICK E. MARTIN. 

